Cos De BAHA Tranexamic Acid 10% Serum Dupes & Cheaper Alternatives
From 80 Reddit threads · Updated October 8, 2026
Tranexamic acid plus niacinamide targets dark spots; can sting sensitive skin. The catch: can sting and wreck a fragile barrier. Here's what Redditors reach for instead.
The short answer
Best Overall AlternativeDark-spot hunter — TXA plus niacinamide does the heavy lifting · $15.40 · 29.9 ml
Best Cheaper AlternativeWatery, fast-absorbing centella · $6.00 · 30 ml vs $11.68 for the original
Best for HyperpigmentationOG 15% L-ascorbic acid antioxidant trio · $70.99 · 15 ml
#1
Best Overall Alternative
- Size: 29.9 ml
- Price per ml: $0.52/ml (original $0.39/ml)
The why
One minus
Sticky, tacky finish that sits on skin
Both recommended for Hyperpigmentation.
“The niacinamide is a must to regulate oil in the area and prevent clogging”
— Reddit, r/SkincareAddiction
The original, at a glance
- Why people love it
- Dark-spot serum with tranexamic acid, niacinamide, and centella
- Price
- $11.68 · 30 ml · $0.39/ml
#2
Best Cheaper Alternative
- Size: 30 ml
- Price per ml: $0.20/ml (original $0.39/ml)
The why
A watery centella ampoule that people use before moisturizer or tret. It suits irritated, dehydrated, or barrier-damaged skin. On very reactive faces, it can sting, break out, or do basically nothing.
One minus
Can trigger closed comedones or whiteheads
Good forSensitive Skin, Dry Skin
Both recommended for Redness / Irritation; discussed alongside Cos De BAHA Tranexamic Acid 10% Serum in 7 threads.
“I have combo acne prone skin”
— Reddit, r/AsianBeauty
#3
Best for Hyperpigmentation
- Size: 15 ml
- Price per ml: $4.73/ml (original $0.39/ml)
The why
A 15% L-ascorbic acid serum built around vitamin E and ferulic acid, with panthenol and sodium hyaluronate in the mix. Best for people chasing brightening, photoaging support, and dark-spot fading. The sting, orange oxidation, and price are the dealbreakers.
One minus
Steep price for a 30 mL bottle
Good forSensitive Skin
Both recommended for Hyperpigmentation.
“It's the only one that didn't make me break out.”
— Reddit, r/SkincareAddiction
#4
Best for Redness / Irritation
Azelaic Acid Hyaluron Redness Soothing Serum
Anua·Serum
See alternatives10% azelaic acid for redness and breakouts
- Size: 29.9 ml
- Price per ml: $0.52/ml (original $0.39/ml)
The why
Studies found azelaic acid helps acne, and Redditors say this 10% serum is especially good for redness, breakouts, and post-acne marks. It’s lightweight and calming, though some people get stinging, dryness, or a weak response.
One minus
Can sting or burn on a compromised barrier
Good forSensitive Skin, Combination Skin, Oily Skin
Both recommended for Acne; discussed alongside Cos De BAHA Tranexamic Acid 10% Serum in 9 threads.
Other alternatives worth a look
Centella, panthenol, and ceramide NP do the barrier-support job · 195 mentions
Sensitive SkinFragrance-Free
Centella-heavy barrier support · 180 mentions
Sensitive SkinCream Texture
Watery first-step layer · 144 mentions
Sensitive SkinUnder Makeup
Oil control and pore shrinkage · 576 mentions
HyperpigmentationTexture / Pores
Absorbs fast, no sticky finish · 265 mentions
Sensitive SkinAlcohol-Free
Beginner retinol — easy first step · 164 mentions
Anti-AgingHyperpigmentation
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